Title:
OPTICAL FIBER BENDING LOSS MEASURING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/251474
Kind Code:
A1
Abstract:
This optical fiber bending loss measuring method is for calculating an optical fiber bending loss by applying bending to an optical fiber F through use of a plurality of mandrels (e.g., fixed mandrels 55 and movable mandrels 65) that are disposed between a feed-out part 10 and a fixing part (e.g., fiber catcher 70) and that are alternately arranged in the longitudinal direction of the optical fiber. The method includes: a step for fixing, to the fixing part, an optical fiber fed out from the feed-out part without being held between adjacent mandrels; a step for moving the movable mandrels to a forward position and applying bending to the optical fiber by sandwiching the optical fiber between adjacent mandrels so as to bend the optical fiber at a prescribed angle in the longitudinal direction; and a step for calculating an optical fiber bending loss in a state where the bending is applied to the optical fiber.
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Inventors:
TEI CHONDE (JP)
HATANAKA TOMOAKI (JP)
KAWAGUCHI YUKI (JP)
TERAUCHI TOMOKO (JP)
HATANAKA TOMOAKI (JP)
KAWAGUCHI YUKI (JP)
TERAUCHI TOMOKO (JP)
Application Number:
PCT/JP2021/022200
Publication Date:
December 16, 2021
Filing Date:
June 10, 2021
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
G01M11/02
Foreign References:
| JPS61239137A | 1986-10-24 | |||
| JP2012018134A | 2012-01-26 | |||
| JPS61128134A | 1986-06-16 | |||
| JPH01203938A | 1989-08-16 | |||
| US20080272221A1 | 2008-11-06 | |||
| US20030142948A1 | 2003-07-31 |
Attorney, Agent or Firm:
TOWA INTERNATIONAL PATENT FIRM (JP)
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